/* eslint-disable*/
(function (global, factory) {
  typeof exports === "object" && typeof module !== "undefined"
    ? factory(exports)
    : typeof define === "function" && define.amd
    ? define(["exports"], factory)
    : ((global = global || self), factory((global.Redux = {})));
})(this, function (exports) {
  "use strict";

  function symbolObservablePonyfill(root) {
    var result;
    var Symbol = root.Symbol;

    if (typeof Symbol === "function") {
      if (Symbol.observable) {
        result = Symbol.observable;
      } else {
        result = Symbol("observable");
        Symbol.observable = result;
      }
    } else {
      result = "@@observable";
    }

    return result;
  }

  /* global window */

  var root;

  if (typeof self !== "undefined") {
    root = self;
  } else if (typeof window !== "undefined") {
    root = window;
  } else if (typeof global !== "undefined") {
    root = global;
  } else if (typeof module !== "undefined") {
    root = module;
  } else {
    root = Function("return this")();
  }

  var result = symbolObservablePonyfill(root);

  /**
   * These are private action types reserved by Redux.
   * For any unknown actions, you must return the current state.
   * If the current state is undefined, you must return the initial state.
   * Do not reference these action types directly in your code.
   */
  var randomString = function randomString() {
    return Math.random().toString(36).substring(7).split("").join(".");
  };

  var ActionTypes = {
    INIT: "@@redux/INIT" + randomString(),
    REPLACE: "@@redux/REPLACE" + randomString(),
    PROBE_UNKNOWN_ACTION: function PROBE_UNKNOWN_ACTION() {
      return "@@redux/PROBE_UNKNOWN_ACTION" + randomString();
    },
  };

  /**
   * @param {any} obj The object to inspect.
   * @returns {boolean} True if the argument appears to be a plain object.
   */
  function isPlainObject(obj) {
    if (typeof obj !== "object" || obj === null) return false;
    var proto = obj;

    while (Object.getPrototypeOf(proto) !== null) {
      proto = Object.getPrototypeOf(proto);
    }

    return Object.getPrototypeOf(obj) === proto;
  }

  /**
   * Creates a Redux store that holds the state tree.
   * The only way to change the data in the store is to call `dispatch()` on it.
   *
   * There should only be a single store in your app. To specify how different
   * parts of the state tree respond to actions, you may combine several reducers
   * into a single reducer function by using `combineReducers`.
   *
   * @param {Function} reducer A function that returns the next state tree, given
   * the current state tree and the action to handle.
   *
   * @param {any} [preloadedState] The initial state. You may optionally specify it
   * to hydrate the state from the server in universal apps, or to restore a
   * previously serialized user session.
   * If you use `combineReducers` to produce the root reducer function, this must be
   * an object with the same shape as `combineReducers` keys.
   *
   * @param {Function} [enhancer] The store enhancer. You may optionally specify it
   * to enhance the store with third-party capabilities such as middleware,
   * time travel, persistence, etc. The only store enhancer that ships with Redux
   * is `applyMiddleware()`.
   *
   * @returns {Store} A Redux store that lets you read the state, dispatch actions
   * and subscribe to changes.
   */

  function createStore(reducer, preloadedState, enhancer) {
    var _ref2;

    if (
      (typeof preloadedState === "function" &&
        typeof enhancer === "function") ||
      (typeof enhancer === "function" && typeof arguments[3] === "function")
    ) {
      throw new Error(
        "It looks like you are passing several store enhancers to " +
          "createStore(). This is not supported. Instead, compose them " +
          "together to a single function."
      );
    }

    if (
      typeof preloadedState === "function" &&
      typeof enhancer === "undefined"
    ) {
      enhancer = preloadedState;
      preloadedState = undefined;
    }

    if (typeof enhancer !== "undefined") {
      if (typeof enhancer !== "function") {
        throw new Error("Expected the enhancer to be a function.");
      }

      return enhancer(createStore)(reducer, preloadedState);
    }

    if (typeof reducer !== "function") {
      throw new Error("Expected the reducer to be a function.");
    }

    var currentReducer = reducer;
    var currentState = preloadedState;
    var currentListeners = [];
    var nextListeners = currentListeners;
    var isDispatching = false;
    /**
     * This makes a shallow copy of currentListeners so we can use
     * nextListeners as a temporary list while dispatching.
     *
     * This prevents any bugs around consumers calling
     * subscribe/unsubscribe in the middle of a dispatch.
     */

    function ensureCanMutateNextListeners() {
      if (nextListeners === currentListeners) {
        nextListeners = currentListeners.slice();
      }
    }
    /**
     * Reads the state tree managed by the store.
     *
     * @returns {any} The current state tree of your application.
     */

    function getState() {
      if (isDispatching) {
        throw new Error(
          "You may not call store.getState() while the reducer is executing. " +
            "The reducer has already received the state as an argument. " +
            "Pass it down from the top reducer instead of reading it from the store."
        );
      }

      return currentState;
    }
    /**
     * Adds a change listener. It will be called any time an action is dispatched,
     * and some part of the state tree may potentially have changed. You may then
     * call `getState()` to read the current state tree inside the callback.
     *
     * You may call `dispatch()` from a change listener, with the following
     * caveats:
     *
     * 1. The subscriptions are snapshotted just before every `dispatch()` call.
     * If you subscribe or unsubscribe while the listeners are being invoked, this
     * will not have any effect on the `dispatch()` that is currently in progress.
     * However, the next `dispatch()` call, whether nested or not, will use a more
     * recent snapshot of the subscription list.
     *
     * 2. The listener should not expect to see all state changes, as the state
     * might have been updated multiple times during a nested `dispatch()` before
     * the listener is called. It is, however, guaranteed that all subscribers
     * registered before the `dispatch()` started will be called with the latest
     * state by the time it exits.
     *
     * @param {Function} listener A callback to be invoked on every dispatch.
     * @returns {Function} A function to remove this change listener.
     */

    function subscribe(listener) {
      if (typeof listener !== "function") {
        throw new Error("Expected the listener to be a function.");
      }

      if (isDispatching) {
        throw new Error(
          "You may not call store.subscribe() while the reducer is executing. " +
            "If you would like to be notified after the store has been updated, subscribe from a " +
            "component and invoke store.getState() in the callback to access the latest state. " +
            "See https://redux.js.org/api-reference/store#subscribelistener for more details."
        );
      }

      var isSubscribed = true;
      ensureCanMutateNextListeners();
      nextListeners.push(listener);
      return function unsubscribe() {
        if (!isSubscribed) {
          return;
        }

        if (isDispatching) {
          throw new Error(
            "You may not unsubscribe from a store listener while the reducer is executing. " +
              "See https://redux.js.org/api-reference/store#subscribelistener for more details."
          );
        }

        isSubscribed = false;
        ensureCanMutateNextListeners();
        var index = nextListeners.indexOf(listener);
        nextListeners.splice(index, 1);
        currentListeners = null;
      };
    }
    /**
     * Dispatches an action. It is the only way to trigger a state change.
     *
     * The `reducer` function, used to create the store, will be called with the
     * current state tree and the given `action`. Its return value will
     * be considered the **next** state of the tree, and the change listeners
     * will be notified.
     *
     * The base implementation only supports plain object actions. If you want to
     * dispatch a Promise, an Observable, a thunk, or something else, you need to
     * wrap your store creating function into the corresponding middleware. For
     * example, see the documentation for the `redux-thunk` package. Even the
     * middleware will eventually dispatch plain object actions using this method.
     *
     * @param {Object} action A plain object representing “what changed”. It is
     * a good idea to keep actions serializable so you can record and replay user
     * sessions, or use the time travelling `redux-devtools`. An action must have
     * a `type` property which may not be `undefined`. It is a good idea to use
     * string constants for action types.
     *
     * @returns {Object} For convenience, the same action object you dispatched.
     *
     * Note that, if you use a custom middleware, it may wrap `dispatch()` to
     * return something else (for example, a Promise you can await).
     */

    function dispatch(action) {
      if (!isPlainObject(action)) {
        throw new Error(
          "Actions must be plain objects. " +
            "Use custom middleware for async actions."
        );
      }

      if (typeof action.type === "undefined") {
        throw new Error(
          'Actions may not have an undefined "type" property. ' +
            "Have you misspelled a constant?"
        );
      }

      if (isDispatching) {
        throw new Error("Reducers may not dispatch actions.");
      }

      try {
        isDispatching = true;
        currentState = currentReducer(currentState, action);
      } finally {
        isDispatching = false;
      }

      var listeners = (currentListeners = nextListeners);

      for (var i = 0; i < listeners.length; i++) {
        var listener = listeners[i];
        listener();
      }

      return action;
    }
    /**
     * Replaces the reducer currently used by the store to calculate the state.
     *
     * You might need this if your app implements code splitting and you want to
     * load some of the reducers dynamically. You might also need this if you
     * implement a hot reloading mechanism for Redux.
     *
     * @param {Function} nextReducer The reducer for the store to use instead.
     * @returns {void}
     */

    function replaceReducer(nextReducer) {
      if (typeof nextReducer !== "function") {
        throw new Error("Expected the nextReducer to be a function.");
      }

      currentReducer = nextReducer; // This action has a similiar effect to ActionTypes.INIT.
      // Any reducers that existed in both the new and old rootReducer
      // will receive the previous state. This effectively populates
      // the new state tree with any relevant data from the old one.

      dispatch({
        type: ActionTypes.REPLACE,
      });
    }
    /**
     * Interoperability point for observable/reactive libraries.
     * @returns {observable} A minimal observable of state changes.
     * For more information, see the observable proposal:
     * https://github.com/tc39/proposal-observable
     */

    function observable() {
      var _ref;

      var outerSubscribe = subscribe;
      return (
        (_ref = {
          /**
           * The minimal observable subscription method.
           * @param {Object} observer Any object that can be used as an observer.
           * The observer object should have a `next` method.
           * @returns {subscription} An object with an `unsubscribe` method that can
           * be used to unsubscribe the observable from the store, and prevent further
           * emission of values from the observable.
           */
          subscribe: function subscribe(observer) {
            if (typeof observer !== "object" || observer === null) {
              throw new TypeError("Expected the observer to be an object.");
            }

            function observeState() {
              if (observer.next) {
                observer.next(getState());
              }
            }

            observeState();
            var unsubscribe = outerSubscribe(observeState);
            return {
              unsubscribe: unsubscribe,
            };
          },
        }),
        (_ref[result] = function () {
          return this;
        }),
        _ref
      );
    } // When a store is created, an "INIT" action is dispatched so that every
    // reducer returns their initial state. This effectively populates
    // the initial state tree.

    dispatch({
      type: ActionTypes.INIT,
    });
    return (
      (_ref2 = {
        dispatch: dispatch,
        subscribe: subscribe,
        getState: getState,
        replaceReducer: replaceReducer,
      }),
      (_ref2[result] = observable),
      _ref2
    );
  }

  /**
   * Prints a warning in the console if it exists.
   *
   * @param {String} message The warning message.
   * @returns {void}
   */
  function warning(message) {
    /* eslint-disable no-console */
    if (typeof console !== "undefined" && typeof console.error === "function") {
      console.error(message);
    }
    /* eslint-enable no-console */

    try {
      // This error was thrown as a convenience so that if you enable
      // "break on all exceptions" in your console,
      // it would pause the execution at this line.
      throw new Error(message);
    } catch (e) {} // eslint-disable-line no-empty
  }

  function getUndefinedStateErrorMessage(key, action) {
    var actionType = action && action.type;
    var actionDescription =
      (actionType && 'action "' + String(actionType) + '"') || "an action";
    return (
      "Given " +
      actionDescription +
      ', reducer "' +
      key +
      '" returned undefined. ' +
      "To ignore an action, you must explicitly return the previous state. " +
      "If you want this reducer to hold no value, you can return null instead of undefined."
    );
  }

  function getUnexpectedStateShapeWarningMessage(
    inputState,
    reducers,
    action,
    unexpectedKeyCache
  ) {
    var reducerKeys = Object.keys(reducers);
    var argumentName =
      action && action.type === ActionTypes.INIT
        ? "preloadedState argument passed to createStore"
        : "previous state received by the reducer";

    if (reducerKeys.length === 0) {
      return (
        "Store does not have a valid reducer. Make sure the argument passed " +
        "to combineReducers is an object whose values are reducers."
      );
    }

    if (!isPlainObject(inputState)) {
      return (
        "The " +
        argumentName +
        ' has unexpected type of "' +
        {}.toString.call(inputState).match(/\s([a-z|A-Z]+)/)[1] +
        '". Expected argument to be an object with the following ' +
        ('keys: "' + reducerKeys.join('", "') + '"')
      );
    }

    var unexpectedKeys = Object.keys(inputState).filter(function (key) {
      return !reducers.hasOwnProperty(key) && !unexpectedKeyCache[key];
    });
    unexpectedKeys.forEach(function (key) {
      unexpectedKeyCache[key] = true;
    });
    if (action && action.type === ActionTypes.REPLACE) return;

    if (unexpectedKeys.length > 0) {
      return (
        "Unexpected " +
        (unexpectedKeys.length > 1 ? "keys" : "key") +
        " " +
        ('"' +
          unexpectedKeys.join('", "') +
          '" found in ' +
          argumentName +
          ". ") +
        "Expected to find one of the known reducer keys instead: " +
        ('"' + reducerKeys.join('", "') + '". Unexpected keys will be ignored.')
      );
    }
  }

  function assertReducerShape(reducers) {
    Object.keys(reducers).forEach(function (key) {
      var reducer = reducers[key];
      var initialState = reducer(undefined, {
        type: ActionTypes.INIT,
      });

      if (typeof initialState === "undefined") {
        throw new Error(
          'Reducer "' +
            key +
            '" returned undefined during initialization. ' +
            "If the state passed to the reducer is undefined, you must " +
            "explicitly return the initial state. The initial state may " +
            "not be undefined. If you don't want to set a value for this reducer, " +
            "you can use null instead of undefined."
        );
      }

      if (
        typeof reducer(undefined, {
          type: ActionTypes.PROBE_UNKNOWN_ACTION(),
        }) === "undefined"
      ) {
        throw new Error(
          'Reducer "' +
            key +
            '" returned undefined when probed with a random type. ' +
            ("Don't try to handle " +
              ActionTypes.INIT +
              ' or other actions in "redux/*" ') +
            "namespace. They are considered private. Instead, you must return the " +
            "current state for any unknown actions, unless it is undefined, " +
            "in which case you must return the initial state, regardless of the " +
            "action type. The initial state may not be undefined, but can be null."
        );
      }
    });
  }
  /**
   * Turns an object whose values are different reducer functions, into a single
   * reducer function. It will call every child reducer, and gather their results
   * into a single state object, whose keys correspond to the keys of the passed
   * reducer functions.
   *
   * @param {Object} reducers An object whose values correspond to different
   * reducer functions that need to be combined into one. One handy way to obtain
   * it is to use ES6 `import * as reducers` syntax. The reducers may never return
   * undefined for any action. Instead, they should return their initial state
   * if the state passed to them was undefined, and the current state for any
   * unrecognized action.
   *
   * @returns {Function} A reducer function that invokes every reducer inside the
   * passed object, and builds a state object with the same shape.
   */

  function combineReducers(reducers) {
    var reducerKeys = Object.keys(reducers);
    var finalReducers = {};

    for (var i = 0; i < reducerKeys.length; i++) {
      var key = reducerKeys[i];

      {
        if (typeof reducers[key] === "undefined") {
          warning('No reducer provided for key "' + key + '"');
        }
      }

      if (typeof reducers[key] === "function") {
        finalReducers[key] = reducers[key];
      }
    }

    var finalReducerKeys = Object.keys(finalReducers); // This is used to make sure we don't warn about the same
    // keys multiple times.

    var unexpectedKeyCache;

    {
      unexpectedKeyCache = {};
    }

    var shapeAssertionError;

    try {
      assertReducerShape(finalReducers);
    } catch (e) {
      shapeAssertionError = e;
    }

    return function combination(state, action) {
      if (state === void 0) {
        state = {};
      }

      if (shapeAssertionError) {
        throw shapeAssertionError;
      }

      {
        var warningMessage = getUnexpectedStateShapeWarningMessage(
          state,
          finalReducers,
          action,
          unexpectedKeyCache
        );

        if (warningMessage) {
          warning(warningMessage);
        }
      }

      var hasChanged = false;
      var nextState = {};

      for (var _i = 0; _i < finalReducerKeys.length; _i++) {
        var _key = finalReducerKeys[_i];
        var reducer = finalReducers[_key];
        var previousStateForKey = state[_key];
        var nextStateForKey = reducer(previousStateForKey, action);

        if (typeof nextStateForKey === "undefined") {
          var errorMessage = getUndefinedStateErrorMessage(_key, action);
          throw new Error(errorMessage);
        }

        nextState[_key] = nextStateForKey;
        hasChanged = hasChanged || nextStateForKey !== previousStateForKey;
      }

      hasChanged =
        hasChanged || finalReducerKeys.length !== Object.keys(state).length;
      return hasChanged ? nextState : state;
    };
  }

  function bindActionCreator(actionCreator, dispatch) {
    return function () {
      return dispatch(actionCreator.apply(this, arguments));
    };
  }
  /**
   * Turns an object whose values are action creators, into an object with the
   * same keys, but with every function wrapped into a `dispatch` call so they
   * may be invoked directly. This is just a convenience method, as you can call
   * `store.dispatch(MyActionCreators.doSomething())` yourself just fine.
   *
   * For convenience, you can also pass an action creator as the first argument,
   * and get a dispatch wrapped function in return.
   *
   * @param {Function|Object} actionCreators An object whose values are action
   * creator functions. One handy way to obtain it is to use ES6 `import * as`
   * syntax. You may also pass a single function.
   *
   * @param {Function} dispatch The `dispatch` function available on your Redux
   * store.
   *
   * @returns {Function|Object} The object mimicking the original object, but with
   * every action creator wrapped into the `dispatch` call. If you passed a
   * function as `actionCreators`, the return value will also be a single
   * function.
   */

  function bindActionCreators(actionCreators, dispatch) {
    if (typeof actionCreators === "function") {
      return bindActionCreator(actionCreators, dispatch);
    }

    if (typeof actionCreators !== "object" || actionCreators === null) {
      throw new Error(
        "bindActionCreators expected an object or a function, instead received " +
          (actionCreators === null ? "null" : typeof actionCreators) +
          ". " +
          'Did you write "import ActionCreators from" instead of "import * as ActionCreators from"?'
      );
    }

    var boundActionCreators = {};

    for (var key in actionCreators) {
      var actionCreator = actionCreators[key];

      if (typeof actionCreator === "function") {
        boundActionCreators[key] = bindActionCreator(actionCreator, dispatch);
      }
    }

    return boundActionCreators;
  }

  function _defineProperty(obj, key, value) {
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value: value,
        enumerable: true,
        configurable: true,
        writable: true,
      });
    } else {
      obj[key] = value;
    }

    return obj;
  }

  function ownKeys(object, enumerableOnly) {
    var keys = Object.keys(object);

    if (Object.getOwnPropertySymbols) {
      keys.push.apply(keys, Object.getOwnPropertySymbols(object));
    }

    if (enumerableOnly)
      keys = keys.filter(function (sym) {
        return Object.getOwnPropertyDescriptor(object, sym).enumerable;
      });
    return keys;
  }

  function _objectSpread2(target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i] != null ? arguments[i] : {};

      if (i % 2) {
        ownKeys(source, true).forEach(function (key) {
          _defineProperty(target, key, source[key]);
        });
      } else if (Object.getOwnPropertyDescriptors) {
        Object.defineProperties(
          target,
          Object.getOwnPropertyDescriptors(source)
        );
      } else {
        ownKeys(source).forEach(function (key) {
          Object.defineProperty(
            target,
            key,
            Object.getOwnPropertyDescriptor(source, key)
          );
        });
      }
    }

    return target;
  }

  /**
   * Composes single-argument functions from right to left. The rightmost
   * function can take multiple arguments as it provides the signature for
   * the resulting composite function.
   *
   * @param {...Function} funcs The functions to compose.
   * @returns {Function} A function obtained by composing the argument functions
   * from right to left. For example, compose(f, g, h) is identical to doing
   * (...args) => f(g(h(...args))).
   */
  function compose() {
    for (
      var _len = arguments.length, funcs = new Array(_len), _key = 0;
      _key < _len;
      _key++
    ) {
      funcs[_key] = arguments[_key];
    }

    if (funcs.length === 0) {
      return function (arg) {
        return arg;
      };
    }

    if (funcs.length === 1) {
      return funcs[0];
    }

    return funcs.reduce(function (a, b) {
      return function () {
        return a(b.apply(void 0, arguments));
      };
    });
  }

  /**
   * Creates a store enhancer that applies middleware to the dispatch method
   * of the Redux store. This is handy for a variety of tasks, such as expressing
   * asynchronous actions in a concise manner, or logging every action payload.
   *
   * See `redux-thunk` package as an example of the Redux middleware.
   *
   * Because middleware is potentially asynchronous, this should be the first
   * store enhancer in the composition chain.
   *
   * Note that each middleware will be given the `dispatch` and `getState` functions
   * as named arguments.
   *
   * @param {...Function} middlewares The middleware chain to be applied.
   * @returns {Function} A store enhancer applying the middleware.
   */

  function applyMiddleware() {
    for (
      var _len = arguments.length, middlewares = new Array(_len), _key = 0;
      _key < _len;
      _key++
    ) {
      middlewares[_key] = arguments[_key];
    }

    return function (createStore) {
      return function () {
        var store = createStore.apply(void 0, arguments);

        var _dispatch = function dispatch() {
          throw new Error(
            "Dispatching while constructing your middleware is not allowed. " +
              "Other middleware would not be applied to this dispatch."
          );
        };

        var middlewareAPI = {
          getState: store.getState,
          dispatch: function dispatch() {
            return _dispatch.apply(void 0, arguments);
          },
        };
        var chain = middlewares.map(function (middleware) {
          return middleware(middlewareAPI);
        });
        _dispatch = compose.apply(void 0, chain)(store.dispatch);
        return _objectSpread2({}, store, {
          dispatch: _dispatch,
        });
      };
    };
  }

  /*
   * This is a dummy function to check if the function name has been altered by minification.
   * If the function has been minified and NODE_ENV !== 'production', warn the user.
   */

  function isCrushed() {}

  if (typeof isCrushed.name === "string" && isCrushed.name !== "isCrushed") {
    warning(
      'You are currently using minified code outside of NODE_ENV === "production". ' +
        "This means that you are running a slower development build of Redux. " +
        "You can use loose-envify (https://github.com/zertosh/loose-envify) for browserify " +
        "or setting mode to production in webpack (https://webpack.js.org/concepts/mode/) " +
        "to ensure you have the correct code for your production build."
    );
  }

  exports.__DO_NOT_USE__ActionTypes = ActionTypes;
  exports.applyMiddleware = applyMiddleware;
  exports.bindActionCreators = bindActionCreators;
  exports.combineReducers = combineReducers;
  exports.compose = compose;
  exports.createStore = createStore;

  Object.defineProperty(exports, "__esModule", { value: true });
});
